Description_x000D_ General description_x000D_ Interferon regulatory factor 4 (IRF4), also known as multiple myeloma oncogene-1 (MUM1), is a transcription factor. It is encoded by the gene mapped to human chromosome 6p25.3. The protein is specifically expressed in lymphocytes._x000D_ Immunogen_x000D_ IRF4 (NP_002451, 342 a.a. ~ 451 a.a) partial recombinant protein with GST tag. MW of the GST tag alone is 26 KDa._x000D_ Sequence_x000D_ LCNDRPNKLERDQTCKLFDTQQFLSELQAFAHHGRSLPRFQVTLCFGEEFPDPQRQRKLITAHVEPLLARQLYYFAQQNSGHFLRGYDLPEHISNPEDYHRSIRHSSIQE_x000D_ Physical form_x000D_ Solution in phosphate buffered saline, pH 7.4_x000D_ Biochem/physiol Actions_x000D_ Interferon regulatory factor 4 (IRF4) plays a vital role in regulation of immunoglobulin class switch recombination and plasma cell differentiation. In addition, it is also implicated in maintaining homeostasis of both mature B and mature T lymphocytes. Mutation in the gene is associated with the risk of developing chronic lymphocytic leukemia (CLL).